Darwin

I am trying to find a way to include the PI constant in my Swift code . I already found help in another answer, to import Darwin which I know gives me access to C functions . I also checked the Math package in Darwin and came across the following declaration: var M_PI: Double { get } /* pi */ So, I assume there is a way to use PI in the code, I just don't know how ... With Swift 3 & 4 , pi is now defined as a static variable on the floating point number types Double , Float and CGFloat , so no specific imports are required any more: Double.pi Float.pi CGFloat.pi Also note that the actual type

I have a class with the following member functions: /// caller pid virtual pid_t Pid() const = 0; /// physical memory size in KB virtual uint64_t Size() const = 0; /// resident memory for this process virtual uint64_t Rss() const = 0; /// cpu used by this process virtual double PercentCpu() const = 0; /// memory used by this process virtual double PercentMemory() const = 0; /// number of threads in this process virtual int32_t Lwps() const = 0; This class' duty is to return process information about caller. Physical memory size can easily determined by a sysctl call, and pid is trivial, but

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